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Harunori Yoshikawa
Centre national de la recherche scientifique
Rayleigh numberPhysicsInstabilityBuoyancyClassical mechanics
47Publications
7H-index
136Citations
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Publications 49
Newest
#1Hayate Nakamura (Ridai: Tokyo University of Science)
#2Tetsuya Ogawa (Ridai: Tokyo University of Science)H-Index: 1
Last. Ichiro Ueno (Ridai: Tokyo University of Science)H-Index: 14
view all 10 authors...
Abstract Hypothesis A disturbance such as a microparticle on the pathway of a spreading droplet has shown the tremendous ability to accelerate locally the motion of the macroscopic contact line (Mu et al., J. Fluid Mech. 830 , 2017 ) [1] . Although this ability has been linked to the particle-liquid interaction, the physical mechanisms behind it are still poorly understood despite its academic interest and the scope of numerous industrial applications in need of fast wetting. Experiments In orde...
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We numerically investigate the behavior of a droplet spreading on a smooth substrate with multiple obstacles. As experimental works have indicated, the macroscopic contact line, or three-phase boundary line, of a droplet exhibits a significant deformation resulting in a local acceleration by successive interactions with an array of tiny obstacles settled on the substrate (Mu et al., Langmuir 35, 2019). We focus on the menisci formation and resultant pressure and velocity fields inside a liquid f...
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#1Changwoo KangH-Index: 3
#2Antoine MeyerH-Index: 3
Last. Innocent MutabaziH-Index: 13
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#1Lizhong Mu (DUT: Dalian University of Technology)H-Index: 1
#2Harunori Yoshikawa (CNRS: Centre national de la recherche scientifique)H-Index: 7
Last. Ichiro Ueno (Ridai: Tokyo University of Science)H-Index: 14
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The wetting process of a high energy surface can be accelerated locally through the capillary interaction of a liquid advancing front with a micro-object introduced to the surface (Mu et al., J. Fluid Mech, 2017, 830, R1). We demonstrate that a linear array of micropillars embedded in a fully wettable substrate can produce quick propagation of liquid along the array. It is observed that multiple interactions of a liquid front with pillars can induce the motion of liquid a hundred times faster th...
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#1Changwoo KangH-Index: 3
#2Antoine MeyerH-Index: 3
Last. Innocent MutabaziH-Index: 13
view all 4 authors...
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#1Harunori YoshikawaH-Index: 7
#2Christian MathisH-Index: 7
Last. Yuji TasakaH-Index: 13
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#1Daichi Kondo (Ridai: Tokyo University of Science)H-Index: 1
#2Lizhong Mu (DUT: Dalian University of Technology)H-Index: 1
Last. Ichiro Ueno (Ridai: Tokyo University of Science)H-Index: 14
view all 10 authors...
2 CitationsSource
#1Lizhong Mu (DUT: Dalian University of Technology)H-Index: 1
#2Harunori Yoshikawa (CNRS: Centre national de la recherche scientifique)H-Index: 7
Last. Ichiro Ueno (Ridai: Tokyo University of Science)H-Index: 14
view all 9 authors...
Abstract We perform experiments to investigate how particles of micro-meter size modify the wetting of a completely wettable solid surface. The motion of a macroscopic contact line (MCL) is observed to be altered in the region surrounding the particles. The MCL is accelerated locally by a single particle to advance approximately 10 times faster than that in the absence of the particle. Different geometrical arrangements of particles produce different wetting speeds and different MCL shapes throu...
1 CitationsSource
#1Florian ZaussingerH-Index: 2
#2Peter HaunH-Index: 1
Last. Innocent MutabaziH-Index: 13
view all 8 authors...
2 CitationsSource
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